<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>后台首页</title>
</head>
<body>
<div class="leftpanel">

    <div style="height: 20%">
        <iframe  marginwidth="0" marginheight="0" width="100%" height="100%"  frameborder="0" scrolling="no"  src="http://localhost:8080/userCore/go_to_title">
        </iframe>
    </div>

    <div style="width:20%;height:430px;float:left;">
        <iframe  marginwidth="0" marginheight="0"  width="100%"    height="100%"   scrolling="no"   frameborder='0' src="http://localhost:8080/userCore/go_to_option">
        </iframe>
    </div>

    <div style="width:80%;height:430px;float:left;">
        <iframe marginwidth="0" marginheight="0"           name='show'   width="100%"   height="100%"       frameborder='0'  src='http://localhost:8080/userCore/go_to_blankpage'>
        </iframe>
    </div>

</div>

</body>
</html>